Construction method for pile-plate-column combined slab platform widened ecological revetment

Abstract

The present invention discloses a construction method for a pile - slab - column combined type widened ecological revetment of a platform, and the main construction steps include: construction of a pile - slab retaining structure, installation of precast foundations, installation of precast columns, installation of precast roof slabs, construction of a permeable road and a water - storage planting area. In the present invention, precast H - shaped piles are driven at the edge of the riverbed, and then fish - nest baffles, planting - trough baffles and top baffles are inserted from bottom to top between adjacent precast H - shaped piles, and at the same time, water - stop belts are arranged between the upper and lower layers of baffles and between the piles and the baffles; then precast columns are bolted in the grooves of the precast foundations and post - cast concrete is poured, and a surrounding fish - nest is sleeved outside the precast columns; then precast roof slabs are bolted to the tops of the H - shaped piles and the precast columns; finally, a permeable road and a water - storage planting area are constructed on the precast roof slabs. The construction method of the present invention has high construction efficiency, the constructed framed - structure revetment takes into account both the river - bank land and the cross - section of the river channel for water flow, has good soil - retaining function, good landscape effect, prominent ecological performance and good water - drainage and water - storage performance.

Description

Technical Field

[0001] The present invention relates to a construction method for a pile - plate - column combined plate platform widened ecological revetment, belonging to the field of water conservancy projects, applicable to river revetment construction, especially applicable to river revetment construction with a narrow width and dense surrounding buildings. Background Technique

[0002] In urban rivers, due to the dense surrounding buildings and limited land red - line scope for river planning or transformation, a single vertical revetment structure or a compound - section revetment structure with a sloping green belt on the upper part, a hydrophilic platform in the middle, and a vertical revetment on the lower part is generally adopted. Urban rivers need to meet basic functions such as water storage, waterlogging drainage, and landscape. The revetment structure is usually relatively simple, generally a rubble retaining wall, a concrete retaining wall, or a concrete "U" - shaped groove structure. With the development of social economy, the traditional river regulation concept is gradually changing, and "clear water quality, ecological beauty, and smooth shore - road" have become the basic requirements for urban rivers. On the premise of fixed total width of the river bank and river, without reducing the river - bank land use and ensuring the smooth shore - road, traditional river revetments cannot expand the cross - sectional area of the river flow except by deepening the river. The narrow and deep river not only increases the implementation difficulty of the revetment but also deepens the water body of the urban river, which is not conducive to safety and has worse hydrophilicity.

[0003] In view of the above problems, it is very important to develop a construction method for a pile - plate - column combined plate platform widened ecological revetment with high construction efficiency, taking into account river - bank land use and river - flow cross - section, good soil - retaining function, good landscape effect, outstanding ecological performance, and good water - storage and drainage performance. The present invention is developed under such a background and will surely achieve remarkable economic and social benefits when applied to actual river revetment construction. Summary of the Invention

[0004] The purpose of the present invention is to address the problems that traditional river revetments cannot expand the cross - sectional area of the river flow, the narrow and deep river has high implementation difficulty, poor safety and hydrophilicity, etc. A construction method for a pile - plate - column combined plate platform widened ecological revetment is proposed. The construction method of the framed - structure revetment has high construction efficiency, and the constructed framed - structure revetment takes into account river - bank land use and river - flow cross - section, has good soil - retaining function, good landscape effect, outstanding ecological performance, and good water - storage and drainage performance.

[0005] In order to achieve the above - mentioned technical objectives, the present invention adopts the following technical solutions:

[0006] The construction method for a pile - plate - column combined plate platform widened ecological revetment includes the following steps:

[0007] Step 1. Construction of the pile-slab retaining structure: Excavate the riverbank and riverbed and compact and trim them. Measure and lay out the position lines of the precast H-shaped piles at the edge of the riverbed. Use pile driving equipment to drive the precast H-shaped piles into the river bottom soil one by one in the order from one side to the other side. Further, paste waterstop strip A and waterstop strip B at the rabbet parts of the top baffle, planting trough baffle, and fish nest baffle, as well as on both sides of the baffle. Then, insert the fish nest baffle, planting trough baffle, and top baffle from bottom to top between adjacent precast H-shaped piles. Use the waterstop strip to ensure the tight combination between the piles and the baffle, as well as between the upper and lower layers of baffles, to prevent soil leakage.

[0008] Step 2. Installation of the precast foundation: Measure and lay out the position lines of the precast foundation installation on the riverbed. Excavate the foundation trench and construct the foundation cushion. Spread mortar at the upper part of the foundation cushion, and then hoist the precast foundation to the upper part of the foundation cushion and hammer it to make it dense. Then, construct the waterproof layer and the protective bottom layer on the upper part of the riverbed on both sides of the precast foundation in turn.

[0009] Step 3. Installation of the precast column: Measure and lay out the position lines of the precast column installation on the precast foundation. Hoist the precast columns into the grooves one by one in the order from one side to the other side, so that the embedded steel bars pass through the reserved holes of the enlarged plate at the bottom of the column. Then, use bolts to fix the enlarged plate and the embedded steel bars. Then, pour post-cast concrete in the groove. After the post-cast concrete is cured, set several layers of circumferential fish nests outside the precast column to ensure the stable installation and neat stacking of the circumferential fish nests.

[0010] Step 4. Installation of the precast roof slab: Hoist the precast roof slab onto the upper parts of the precast H-shaped piles and the precast columns. Manually fine-tune the position of the precast roof slab so that the pile card slots are sleeved on the tops of the precast H-shaped piles and the column card slots are sleeved on the tops of the precast columns. Then, release the lifting device, and use tie bolts to fix the pile card slots to the precast H-shaped piles and the column card slots to the precast columns in turn.

[0011] Step 5. Construction of the permeable road and the water storage and planting area: Backfill the soil behind the pile-slab retaining structure in layers. Then, construct the permeable base course, permeable cushion course, and permeable surface course on the backfill soil and the precast roof slab to form a permeable road. Further, construct a water storage layer in the planting bin and fill it with planting soil to form a water storage and planting area. Then, use an air pump to blow the T-shaped overflow channel and the Z-shaped overflow channel to remove the impurities in the channels, and then fill the upper and lower planting troughs with soil and plant.

[0012] Preferably, the precast roof slab is composed of a pile card board, a column card board, a partition board, an edge board, an upper planting trough, and a lower planting trough. Two pile card boards are arranged on one side of the lower part of the precast roof slab to form pile card slots, and two column card boards are arranged on the other side to form column card slots. Bolt holes are arranged on the pile card board and the column card board. A partition board and an edge board are arranged on the upper part of the precast roof slab to form a planting bin. A T-shaped overflow channel is arranged inside the partition board. A Z-shaped overflow channel is arranged inside the edge board. The upper planting trough and the lower planting trough are arranged on the water-facing side of the precast roof slab. An overflow hole is arranged at the upper edge of the upper planting trough.

[0013] Preferably, the wrap-around fish nest is a hollow precast member, with column holes provided at the top and bottom, and fish nest holes provided around the perimeter.

[0014] Preferably, the top baffle, the planting trough baffle, and the fish nest baffle are all precast members; a tongue-and-groove is provided at the lower part of the top baffle; the planting trough baffle is composed of baffle A and the planting trough, and tongue-and-grooves are provided at the upper and lower parts of baffle A; the fish nest baffle is composed of baffle B and the fish nest box, and tongue-and-grooves are provided at the upper and lower parts of baffle B.

[0015] Preferably, a groove is provided on the upper part of the precast foundation, and embedded steel bars are provided at the bottom of the groove.

[0016] Preferably, bolt holes are provided at the top of the precast column, an enlarged plate is provided at the bottom, and reserved holes are provided on the enlarged plate.

[0017] Preferably, bolt holes are provided at the top of the precast H-pile.

[0018] The present invention has the following characteristics and beneficial effects:

[0019] (1) The pile-plate retaining structure has outstanding comprehensive performance. A water stop belt is provided between the precast H-pile and components such as the baffle, promoting close combination between the components, effectively solving the problem of easy soil leakage in the traditional pile-plate structure, and having an outstanding soil retaining function. In addition, when urban land is in short supply, demolition is difficult, and surrounding buildings are dense, the pile-plate retaining structure can be directly used as a revetment, with a high degree of comprehensive utilization.

[0020] (2) The riverbank land and the cross-section of the river channel are guaranteed. While not reducing the riverbank land and keeping the bank road unobstructed, the frame structure neither deepens the riverbed nor can expand the cross-section of the river channel, increasing the hydrophilicity.

[0021] (3) The frame-type revetment structure has good landscape effects and outstanding ecological performance. A fish nest baffle is provided between the precast H-piles, and a wrap-around fish nest is sleeved outside the precast column, providing a large amount of space for the survival of fish schools. The fish schools can forage or lay eggs in the fish nest; a planting trough is provided on one side of the outer edge of the precast top plate, effectively beautifying the visual appearance of the revetment structure above the normal water level; a clay impermeable layer and a pebble protection layer are implemented on the expanded riverbed surface within the frame, which is beneficial to the growth of moss plants, achieving the effect of improving water quality and riverbank landscape.

[0022] (4) The frame-type revetment structure has high construction efficiency. Components such as H-piles, baffles, columns, and top plates are all precast in factories, with a high degree of standardization and guaranteed quality of the components; bolt connections are mostly used for the assembly between components at the construction site, which is convenient to operate and has high structural stability, reducing the amount of in-situ pouring operations in the construction of the traditional revetment structure and improving the construction efficiency.

[0023] (5) The framed revetment structure has good water storage and drainage performance. A permeable pavement and a water storage and planting area are set on the upper part of the revetment structure, which can effectively store rainwater. An overflow channel is set on the upper part of the revetment structure. The surface runoff can be discharged into the river through the overflow channel, or can be discharged into the planting trough through the overflow channel (ensuring the water supply of the lower planting trough). Therefore, the surface runoff can be quickly discharged, reducing the impact of surface runoff on the revetment structure, with high safety and not prone to collapse. Description of the Drawings

[0024] Figure 1 is the sectional view of the pile - slab - column combined slab platform widened ecological revetment;

[0025] Figure 2 is Figure 1 the A - A sectional view of

[0026] Figure 3 is the detail drawing of the precast roof slab;

[0027] Figure 4 is the perspective view of the surrounding - type fish nest;

[0028] Figure 5 is the perspective view of the planting trough baffle;

[0029] Figure 6 is the perspective view of the fish nest baffle;

[0030] Figure 7 is the detail drawing of the precast foundation;

[0031] Figure 8 is the detail drawing of the precast column;

[0032] Figure 9 is the construction schematic diagram of the pile - plate retaining structure;

[0033] Figure 10 is the installation schematic diagram of the precast foundation;

[0034] Figure 11 is the installation schematic diagram of the precast column;

[0035] Figure 12 is the installation schematic diagram of the precast roof slab;

[0036] Figure 13 is the construction schematic diagram of the permeable road and the water storage and planting area.

[0037] In the figure: 1. Prefabricated top slab, 101. Pile clamping plate, 102. Pile clamping groove, 103. Column clamping plate, 104. Column clamping groove, 105. Partition board, 1051. T-shaped overflow channel, 106. Edge board, 1061. Z-shaped overflow channel, 107. Planting bin, 108. Upper planting trough, 1081. Overflow hole, 109. Lower planting trough, 2. Prefabricated H-shaped pile, 3. Top baffle, 4. Planting trough baffle, 401. Baffle A, 402. Planting trough, 5. Fish nest baffle, 501. Baffle B, 502. Fish nest box, 6. Prefabricated column, 601. Enlarged board, 7. Prefabricated foundation, 701. Groove, 702. Embedded reinforcement, 8. Surrounding fish nest, 801. Column hole, 802. Fish nest hole, 9. Waterstop A, 10. Waterstop B, 11. River bank, 12. Foundation cushion, 13. Backfill soil, 14. Permeable base course, 15. Permeable cushion, 16. Permeable surface course, 17. Water storage layer, 18. Planting soil, 19. Normal water level, 20. Protective bottom layer, 21. Impervious layer, 22. Post-cast concrete, 23. River bed. Detailed implementation manners

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention and are not limited to the following embodiments. In a river bank regulation project of a certain river, the width of the river is less than 3m. After regulation, the drainage scale requires the width of the river to be 5m - 20m. In some sections, the distance between the building and the river bank is only 2m - 3m. The construction method of a pile-slab-column combined slab platform for widening an ecological river bank is adopted.

[0039] Combined with the attached Figure 1 、attached Figure 2As shown in the figure, the pile-plate-column combined slab platform widened ecological revetment involved in the present invention includes precast H-shaped piles 2, precast columns 6, precast roof slabs 1, precast foundations 7, and riverbed 23; the precast H-shaped piles 2 are evenly driven into the edge part of the riverbed 23, and fish nest baffles 5, planting groove baffles 4, and top baffles 3 are inserted successively from bottom to top between the precast H-shaped piles 2. The precast H-shaped piles 2 are precast reinforced concrete components processed with C25F50 concrete, and the pile cross-section size is 500mm×500mm; a water stop belt A9 is arranged between the upper and lower baffles, and a water stop belt B10 is arranged between the baffle and the precast H-shaped pile 2. The water stop belt A9 and the water stop belt B10 adopt rubber water stop strips; the precast column 6 is bolted to the embedded reinforcement 702 at the bottom of the precast foundation 7 through an enlarged plate 601; post-cast concrete 22 is poured into the groove 701, and the post-cast concrete 22 adopts fine aggregate concrete; a foundation cushion 12 is constructed at the bottom of the precast foundation 7, and the foundation cushion 12 is poured into the riverbed 23. The foundation cushion 12 is a 10 cm thick C10 plain concrete cushion; the precast roof slab 1 is bolted to the top of the precast H-shaped pile 2 through a pile card slot 102 on the water-retaining side and bolted to the top of the precast column 6 through a column card slot 104 on the water-facing side; a permeable road and a water storage and planting area are constructed on the upper part of the precast roof slab 1. Among them, the permeable road includes a permeable base course 14, a permeable cushion 15, and a permeable surface course 16 from bottom to top. The permeable base course 14 is a 30 cm thick graded crushed stone layer, the permeable cushion 15 is a 3 cm thick sand filter layer, and the permeable surface course 16 is a 15 cm thick permeable concrete with a particle size of 1.0 cm. The water storage and planting area includes a water storage layer 17 and planting soil 18 from bottom to top. The water storage layer 17 is a 30 cm thick graded crushed stone layer; a water isolation layer 21 and a bottom protection layer 20 are successively constructed on the upper part of the riverbed 23. The water isolation layer 21 is a 25 cm thick clay layer, and the bottom protection layer 20 is a 25 cm thick pebble bottom protection.

[0040] As Figure 3 shown, the precast roof slab 1 is composed of a pile card plate 101, a column card plate 103, a partition plate 105, an edge plate 106, an upper planting groove 108, and a lower planting groove 109. The precast roof slab 1 is a C25F50 reinforced concrete structure with a wall thickness of 180 mm; two pile card plates 101 are arranged on one side of the lower part of the precast roof slab 1 to form a pile card slot 102, and two column card plates 103 are arranged on the other side to form a column card slot 104; bolt holes are opened on the pile card plate 101 and the column card plate 103; a partition plate 105 and an edge plate 106 are arranged on the upper part of the precast roof slab 1 to form a planting bin 107; a T-shaped overflow channel 1051 is opened inside the partition plate 105; a Z-shaped overflow channel 1061 is opened inside the edge plate 106; an upper planting groove 108 and a lower planting groove 109 are arranged on the water-facing side of the precast roof slab 1; an overflow hole 1081 is opened at the upper edge of the upper planting groove 108.

[0041] As Figure 4As shown in the figure, the wrap-around fish nest 8 is a hollow precast member made of C25F50 concrete with a wall thickness of 60 mm. Column holes 801 are provided at the top and bottom, and fish nest holes 802 are provided around the perimeter.

[0042] As Figure 5 shown in the figure, the planting trough baffle 4 is a precast member made of C25F50 concrete, which consists of baffle A401 and planting trough 402. Mortise and tenon joints are provided at the upper and lower parts of baffle A401. The wall thickness of baffle A401 is 150 mm, and the wall thickness of planting trough 402 is 60 mm.

[0043] As Figure 6 shown in the figure, the fish nest baffle 5 is a precast member made of C25F50 concrete, which consists of baffle B501 and fish nest box 502. Mortise and tenon joints are provided at the upper and lower parts of baffle B501. The wall thickness of baffle B501 is 150 mm, and the wall thickness of fish nest box 502 is 60 mm.

[0044] As Figure 7 shown in the figure, the precast foundation 7 is a reinforced concrete member made of C25F50 concrete. A groove 701 is provided at the upper part of the precast foundation 7. The groove 701 is 500 mm long, 500 mm wide, and 250 mm high. Embedded steel bars 702 are buried at the bottom of the groove 701.

[0045] As Figure 8 shown in the figure, the precast column 6 is a reinforced concrete member made of C25F50 concrete. Bolt holes are provided at the top of the precast column 6, and an enlarged plate 601 is provided at the bottom. The enlarged plate 601 is 500 mm long, 500 mm wide, and 120 mm thick; reserved holes are provided on the enlarged plate 601.

[0046] As Figure 9 shown in the figure, the river bank 11 and the river bed 23 are excavated and compacted and trimmed. The position line of the precast H-shaped pile 2 is measured and set at the edge part of the river bed 23; using pile driving equipment, the precast H-shaped piles 2 are driven into the river bottom soil section by section in the order from one side to the other side; further, water stop belts A9 and water stop belts B10 are pasted at the mortise and tenon joint parts of the top baffle 3, the planting trough baffle 4, and the fish nest baffle 5 and on both sides of the baffles; then, the fish nest baffle 5, the planting trough baffle 4, and the top baffle 3 are inserted from bottom to top between adjacent precast H-shaped piles 2 in turn, and the water stop belts are used to ensure the tight combination between the piles and the baffles and between the upper and lower layers of baffles to avoid soil leakage.

[0047] As Figure 10 shown in the figure, the installation position line of the precast foundation 7 is measured and set on the river bed 23, the foundation trench is excavated and the foundation cushion 18 is constructed; mortar is used for paving the bottom on the upper part of the foundation cushion 18, and then the precast foundation 7 is hoisted to the upper part of the foundation cushion 18 and hammered and compacted; then, the water-proof layer 21 and the protection layer 20 are constructed on the upper part of the river bed 23 on both sides of the precast foundation 7 in turn.

[0048] AsFigure 11 As shown, lay out the installation position line of the precast column 6 on the precast foundation 7. Hoist the precast column 6 into the groove 701 section by section in the order from one side to the other side, so that the embedded steel bars 702 pass through the reserved holes of the column bottom enlarged plate 601, and then use bolts to fix the enlarged plate 601 and the embedded steel bars 702; then pour the post-cast concrete 22 into the groove 701; after the post-cast concrete 22 is cured, set several layers of circumferential fish nests 8 outside the precast column 6 to ensure that the circumferential fish nests 8 are installed stably and stacked neatly.

[0049] As Figure 12 shown, hoist the precast roof slab 1 onto the precast H-shaped pile 2 and the upper part of the precast column 6, and manually fine-tune the position of the precast roof slab 1 so that the pile card slot 102 is sleeved on the top of the precast H-shaped pile 2 and the column card slot 104 is sleeved on the top of the precast column 6; then release the lifting appliance, and use the tension bolts to fix the pile card slot 102 and the precast H-shaped pile 2, and the column card slot 104 and the precast column 6 in turn.

[0050] As Figure 13 shown, backfill the soil 13 at the back of the pile-plate-column combined slab platform in layers; then construct a permeable base course 14, a permeable cushion course 15 and a permeable surface course 16 on the backfill soil 13 and the upper part of the precast roof slab 1 to form a permeable road; further construct a water storage layer 17 in the planting bin and fill it with planting soil 18 to form a water storage and planting area; then use an air pump to blow and sweep the T-shaped overflow channel 1051 and the Z-shaped overflow channel 1061 to remove the impurities in the channels, and then fill and plant in the upper and lower planting grooves.

[0051] The construction steps of the pile-plate-column combined slab platform widened ecological revetment include:

[0052] Step 1, construction of the pile-plate retaining structure: Excavate the river bank 11 and the river bed 23 and compact and trim them. Lay out the position line of the precast H-shaped pile 2 at the edge of the river bed 23; use a pile driving device to drive the precast H-shaped pile 2 into the river bottom soil section by section in the order from one side to the other side; further paste the water stop strip A9 and the water stop strip B10 at the tongue-and-groove parts of the top baffle 3, the planting groove baffle 4, the fish nest baffle 5 and on both sides of the baffle; then insert the fish nest baffle 5, the planting groove baffle 4 and the top baffle 3 from bottom to top between adjacent precast H-shaped piles 2 in turn, and use the water stop strip to ensure the tight combination between the pile and the baffle and between the upper and lower layers of baffles to avoid soil leakage.

[0053] Step 2, installation of the precast foundation: Lay out the installation position line of the precast foundation 7 on the river bed 23, excavate the foundation trench and construct the foundation cushion 18; lay a mortar bottom on the upper part of the foundation cushion 18, and then hoist the precast foundation 7 onto the upper part of the foundation cushion 18 and hammer it densely; then construct a water-proof layer 21 and a protection bottom layer 20 on the upper part of the river bed 23 on both sides of the precast foundation 7 in turn.

[0054] Step 3. Installation of precast columns: Measure and lay out the installation position lines of precast columns 6 on the precast foundation 7. Lift and install the precast columns 6 into the grooves 701 one by one in the order from one side to the other side, so that the embedded steel bars 702 pass through the reserved holes of the column bottom enlarged plate 601, and then fix the enlarged plate 601 and the embedded steel bars 702 with bolts; then pour post-cast concrete 22 into the grooves 701; after the post-cast concrete 22 is cured, set several layers of circumferential fish nests 8 outside the precast columns 6 to ensure that the circumferential fish nests 8 are installed stably and neatly stacked.

[0055] Step 4. Installation of precast roof slabs: Lift and install the precast roof slab 1 on the upper parts of the precast H-shaped piles 2 and the precast columns 6, and manually fine-tune the position of the precast roof slab 1 so that the pile card slots 102 are sleeved on the tops of the precast H-shaped piles 2 and the column card slots 104 are sleeved on the tops of the precast columns 6; then release the lifting tool, and then fix the pile card slots 102 and the precast H-shaped piles 2, and the column card slots 104 and the precast columns 6 with tension bolts in turn.

[0056] Step 5. Construction of permeable road and water storage planting area: Backfill soil 13 at the back of the pile-plate retaining structure in layers; then construct a permeable base course 14, a permeable cushion layer 15 and a permeable surface layer 16 on the backfill soil 13 and the precast roof slab 1 to form a permeable road; further construct a water storage layer 17 in the planting bin and fill it with planting soil 18 to form a water storage planting area; then use an air pump to blow the T-shaped overflow channel 1051 and the Z-shaped overflow channel 1061 to remove impurities in the channels, and then fill and plant in the upper and lower planting grooves.

[0057] The present invention has been described in detail in combination with the embodiments above, but the content described above is only the preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. Construction method of pile - slab - column combined slab platform widened ecological revetment, characterized in that, It includes the following steps: Step 1. Construction of the pile - slab retaining structure: Excavate the riverbank (11) and the riverbed (23) and compact and trim them. Measure and set the position line of the precast H - shaped piles (2) at the edge of the riverbed (23). Use pile - driving equipment to drive the precast H - shaped piles (2) into the river - bottom soil section by section in the order from one side to the other side. Further, paste the water - stop strip A (9) and the water - stop strip B (10) at the rabbet parts of the top baffle (3), the planting - trough baffle (4), the fish - nest baffle (5) and on both sides of the baffles. Then, insert the fish - nest baffle (5), the planting - trough baffle (4) and the top baffle (3) from bottom to top between adjacent precast H - shaped piles (2). Use the water - stop strip to ensure the tight combination between the piles and the baffles and between the upper and lower layers of baffles to avoid soil leakage; Step 2. Installation of the precast foundation: Measure and set the installation position line of the precast foundation (7) on the riverbed (23). Excavate the foundation trench and construct the foundation cushion (12). Lay a mortar bottom on the upper part of the foundation cushion (12), and then hoist the precast foundation (7) to the upper part of the foundation cushion (12) and hammer it densely. Then, construct the water - proof layer (21) and the protective bottom layer (20) on the upper part of the riverbed (23) on both sides of the precast foundation (7) in sequence; Step 3. Installation of the precast column: Measure and set the installation position line of the precast column (6) on the precast foundation (7). Hoist the precast column (6) into the groove (701) section by section in the order from one side to the other side, so that the embedded steel bars (702) pass through the reserved holes of the column bottom expansion plate (601). Then, fix the expansion plate (601) and the embedded steel bars (702) with bolts. Then, pour the post - cast concrete (22) into the groove (701). After the curing of the post - cast concrete (22) is completed, set several layers of circumferential fish - nests (8) outside the precast column (6) to ensure the stable installation and neat stacking of the circumferential fish - nests (8); Step 4. Installation of the precast roof slab: Hoist the precast roof slab (1) onto the upper parts of the precast H - shaped piles (2) and the precast columns (6). Manually fine - tune the position of the precast roof slab (1) so that the pile card slot (102) is sleeved on the top of the precast H - shaped pile (2) and the column card slot (104) is sleeved on the top of the precast column (6). Then, release the lifting device, and then fix the pile card slot (102) and the precast H - shaped pile (2), and the column card slot (104) and the precast column (6) with tie - rods in sequence; Step 5. Construction of the permeable road and the water - storage planting area: Fill the backfill soil (13) behind the pile - slab retaining structure in layers. Then, construct the permeable base course (14), the permeable cushion course (15) and the permeable surface course (16) on the upper parts of the backfill soil (13) and the precast roof slab (1) to form a permeable road. Further, construct the water - storage layer (17) and fill the planting soil (18) in the planting bin to form a water - storage planting area. Then, use an air pump to blow the T - shaped overflow channel (1051) and the Z - shaped overflow channel (1061) to remove the impurities in the channels, and then fill the soil and plant in the upper and lower planting troughs; The precast roof slab (1) is composed of a pile clamping plate (101), a column clamping plate (103), a partition plate (105), an edge plate (106), an upper planting groove (108), and a lower planting groove (109); two pile clamping plates (101) are arranged on one side of the lower part of the precast roof slab (1) to form a pile clamping groove (102), and two column clamping plates (103) are arranged on the other side to form a column clamping groove (104); bolt holes are arranged on the pile clamping plate (101) and the column clamping plate (103); a partition plate (105) and an edge plate (106) are arranged on the upper part of the precast roof slab (1) to form a planting bin (107); a T-shaped overflow channel (1051) is arranged inside the partition plate (105); a Z-shaped overflow channel (1061) is arranged inside the edge plate (106); the upper planting groove (108) and the lower planting groove (109) are arranged on the water-facing side of the precast roof slab (1); an overflow hole (1081) is arranged at the upper edge of the upper planting groove (108). A groove (701) is arranged on the upper part of the precast foundation (7), and embedded steel bars (702) are arranged at the bottom of the groove (701). Bolt holes are arranged at the top of the precast column (6), an enlarged plate (601) is arranged at the bottom, and a reserved hole is arranged on the enlarged plate (601).

2. Construction method of pile - slab - column combined slab platform widened ecological revetment according to claim 1, characterized in that: The surrounding fish nest (8) is a hollow precast member, column holes (801) are arranged at the top and the bottom, and fish nest holes (802) are arranged around the periphery.

3. The construction method of the pile-plate-column combined slab platform widened ecological revetment according to claim 1, characterized in that: The top baffle (3), the planting groove baffle (4), and the fish nest baffle (5) are all precast members; a rabbet is arranged at the lower part of the top baffle (3); the planting groove baffle (4) is composed of a baffle A (401) and a planting groove (402), and rabbets are arranged at the upper and lower parts of the baffle A (401); the fish nest baffle (5) is composed of a baffle B (501) and a fish nest box (502), and rabbets are arranged at the upper and lower parts of the baffle B (501).

4. The construction method of the pile-plate-column combined slab platform widened ecological revetment according to claim 1, characterized in that: Bolt holes are arranged at the top of the precast H-shaped pile (2).

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